Three strings were out on the town and decided to go into a nightclub. Unfortunately, there was a sign on the door that said “No Strings.” One of them decided to try to get in anyhow. When he got to the door, the attendant said, “Aren’t you a string?” and pointed to the sign. Dejected, the string returned to his two friends. The second string decided to try as well, but was told exactly the same thing. Finally, the third string had an idea. He contorted himself into interleaving loops and mussed up his hair. Then he proceeded confidently to the door, where the doorman again repeated the question, “Aren’t you a string?” The third string smugly replied…. “I’m afraid not!”